Photographer&#39;s developing-frame.



L. GRUBMAN.

PHOTOGRAPHER'S DEVELOPING FRAME.

APPLICATION FILED MAR. 25, 1911.

Patented Mar. 5, 1912.

wi mwoeo UNITED STATES PATENT orrion LEO GRUBMAN, OF NEW YORK, N. Y., ASSIGNOR TO FREDERICK B. CORE, OF NEW YORK,

PHOTOGRAPHERS DEVELOPING-FRAME.

Specification of Application filed March 25,

To all whom it may concern: I

GRUBMAN, a citifollowing is a specification.

' during all the processes of development, fix- Fig. 3 illustrates a vertical In the developing, fixing and washing of exposed photographic plates as ordinarily practiced, a series-of objectionable incidents are encountered, that is to say, the fingers of the operator are badly stained by the chemicals used in the baths; also the plates are apt to come in contact with or rub against one anonther or against the developing tray in such manner as to occasion scratches and other defects thereon; also it is sometimes diflicult to lift the plates from the developing tray without the fingers of the operator coming in contact with the emulsion, which is apt to leave'so-called fingerprints on themfand since many, if not most negatives have to be examined frequently during the developing processes, great care must be exercised that scratches and finger prints referred to are not produced.

. Under my invention I provide a suitable frame for the reception and retention of each plate, so constructed and arranged that ing and washing, the fingers of the operator need never. come in contact with the baths, and scratches, finger prints or other defacement will not occur; and in addition to this each plate may be "examined. as often as desired with the greatest ease and rapidity and transferred with equal ease and rapidity from the developing to the fixing tank and from the fixing to the washing tank. Also a record of the developments may be accurately and easily kept.

- Referring to the drawings, Figure l illustrates the invention as employed in a tank adapted to its use; Fig. 2 illustrates a front elevation. of the invention, a plate being shown in position therein in dotted lines;

sectional view of a modified construction; Fig. 4 illustrates a horizontal sectional view taken on about the medial line of Fig. 2.

The. form of the invention illustrated in the drawings is one form only in which it ma be constructed.

is shown in the drawings and so I prefer i Letters Patent.

1911. Serial No; 616,790.

to make it, the device is formed of metal, preferably brass. It may be made of such other material as preferred. It embodies an upper cross bar 1 to which a frame 2 is attached as at 3, 3. The frame consists of a bottom cross bar and two vertical members extending therefrom as shown. These three members constitute the plate receiving and material bent and shaped as illustrated in Fig. 4, that is to say, so as to'aiford a flat member 4, an oli'set 5 and a plate confining lip or flange 6. The part 4, as illustrated in Flg. 1, is attached'to the bar at the top of the device and I preferto cut away the parts 4 and 6 at the corners 7 of the device, as illustrated in Fig. 2, so that the metal may be readily bent atright angles at these corners into the form shown in Fig. 2. This serves-also another purpose, that is to say, it allows drainage ofthe bottom or horizon tal part of this frame, so that the baths and wash water may readily drain 01f. It is to be understood that it is not necessary to cut away the corners of both the vertical bars and the horizontal bar in order to provide a sufiicient drainage opening as the cutting away of either the corners of the vertical bars or the corners of the horizontal bar would be sufficient.

In Fig. 3 I illustrate a modified construction in which the two side members of the frame are, or may be made as above described, but the bottom member, instead of being grooved to receive and support the lower edge of the plate during the developing, fixing and washing operations, may be made in the form of a mere bar 8 upon which the lower edge of the plate will rest. Both forms have advantages. \Vhen a mere bar is used as the lower supporting member, then none of the liquid of either of the baths will be retained in contact with the plate, which sometimes occasions slight blurring along its lower edge. If, however, the lower member be grooved the same as the side members. then a plate which is too narrow to extend across the frame from side to side may nevertheless be conveniently developed in my device, because if its vertical edge be-"engaged with one of the upright members,' then its lower Patented Mar. 5, 1912.

. of suitable ing' liquors as usual.

ported against falling in any direction prac tic-ally as well as though both its vertical edges were engaged in the vertical members of my device. 111 this construction the resulting negative is improved. because of the drainage facilities above described.

The operation of L110 device is illustrated in Fig. 1, that is to say, a developing tank dimensions is provided and filled with the developing, fixing or wash- The plates are then inserted in the developing frames and are lowered into the liquor in the tank, until the projecting ends 9, 9, ofthe upper cross bar 1 rest upon the upper edges of the tank, as shown in Fig. 1. Any desired number of frames carrying plates may introduced into the tank at the same-time, the capacity of the tank being the only limitation, and the plates may be moved to cause agitation of the liquor by pressing the hand upon the upper edge of the cross moving it forward and bar 1 and gently desired to examine the back. When it' is plates, fingers into the bath and'carefully removing the plate, simply grasps the upper cross bar 1 in his hand and lifts the frame and the plate supported by it from the bath, examines it and returns it again, or transfers it to the next or fixing bath, as he may find desirable. The same manipulations apply to the fixing bathand indue coursethe frame carrying the plate will be transferred from it to the washing tank, where the operation will be complete. It will be noted that the liquid of the developing and fixing baths respectively will flow out at the corners 7 7, of the frame, if the lower bar be grooved and the metal of the parts 4 and 6 be cut away as illustrated in velopment of plates,

it will be obvious tothose who are familiar withsuch matters that the details of construction of the invention are unimportant since they may be very widely departed from and yet the essential features of the invention be retained.

Although this invention is especially intended for use in connection with the deobviously it is equally Copies of this patent the operator instead of putting his well adapted to the development of films,

provided they are either stiff enough, by themselves to stand in and be supported by the device, or if they be inclosed in a suitable framework or otherwise rendered stiff enough so to do. In the claimshereof I shall refer to all such as plates. The two forms illustrated and described are examples merely of many in which the invention may be constructed.

I claim:

1. A developing frame comprising a cross bar of sufficient length to span across a tank and rest upon its upper edges, a vertically arranged frame depending from said cross bar and comprising continuous grooved vertical side bars and a horizontal cross bar connecting the lower ends of the side bars, said frame adapted to receive and support a photographic plate by continuous engagement of the lower horizontal and the vertical side bars of said frame with said plate the upper ends of the grooves in the vertical side bars being open.

2. A developing frame comprising a cross bar of suflicient length to span across a tank and rest upon its upper edges, a vertically arranged photographic plate supporting frame depending from said cross bar and comprising continuous grooved vertical side bars and a horizontal grooved cross bar connecting the lower ends of the side bars certain of said bars provided with drainage openings for the escape of the developing liquids.

3. A developing frame comprising a cross bar of sufficient length to span across a tank and rest upon its upper edges, a vertically arranged photographic plate supporting frame depending from said cross bar and comprising continuous grooved vertical side bars and a horizontal cross bar connecting the lower ends of the side bars, all of said bars being arranged in the same plane.

In testimony whereof I have signed my name to this specification in the presence of Commissioner of Patents,

Washington, D. G. 

